Hi Daniel, What version of the Java client are you using?
Any reason you're on such an old version of Riak? What is the size of each object written? -- Luke Bakken Engineer lbak...@basho.com On Wed, May 13, 2015 at 4:48 AM, Daniel Iwan <iwan.dan...@gmail.com> wrote: > Hi > > I'm using 4 node Riak cluster v1.3.1 > > I wanted to know a little bit more about using withoutFetch() option when > used with levelDB. > I'm trying to write to a single key as fast as I can with n=3. > I deliberately create siblings by writing with stale vclock. I'm limiting > number of writes to 1000 per key to keep size of Riak object under control > and then I switch to another key. Siblings will probably never be resolved > (or resolved in realtime during sporadic reads) > > Single write operation is about 250 bytes, rate 10-80 events per sec which > gives 3-20kB per second per node. So roughly 100kB / s for the cluster. > > During the test I see activity on the on disk via iostat and it's between > 20-30 MB/s on each node. > Even taking into account multiple copies and overhead of Riak (vclocks etc) > this seems to be pretty high rate. > I don't see any read activity which suggest withoutFetch() works as > expected. > After 2 mins of tests leveldb on each node is 250MB is size, before test > (11MB) > > Am I using it incorrectly? > Is writing in this way to a single key a good idea or will I be bitten by > something? > How to explain high number of MB written to disks? > > Regards > Daniel > > > > > > > > > -- > View this message in context: > http://riak-users.197444.n3.nabble.com/Clarifying-withoutFetch-with-LevelDB-and-tp4033051.html > Sent from the Riak Users mailing list archive at Nabble.com. > > _______________________________________________ > riak-users mailing list > riak-users@lists.basho.com > http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com _______________________________________________ riak-users mailing list riak-users@lists.basho.com http://lists.basho.com/mailman/listinfo/riak-users_lists.basho.com
